In the title compound, [Co(N(3))(2)(C(6)H(6)N(4))(2)], the Co(II) atom lies on a centre of inversion and is bonded to two azide ions and two bidentate 2,2'-biimidizole ligands, giving a slightly distorted octa-hedral CoN(6) coordination geometry. In the crystal structure, inter-molecular N-H⋯N hydrogen bonds exist between the 2,2'-biimidizole ligands and the azide ions, linking the complexes in...

In the title compound, [Fe(N(3))(2)(C(6)H(6)N(4))(2)], the Fe atom is bonded to two azide ions located in axial positions and to two equatorially positioned bidentate biimidazole ligands, forming a slightly distorterd octa-hedron. The non-H atoms of the equatorial plane are coplanar, with a mean deviation of 0.0355 (2) Å. The Fe(II) cation lies on an inversion centre. Thus, the asymmetric unit ...

In title compound, [Cu(C(8)H(7)O(2))(2)(C(6)H(6)N(4))(2)], the Cu(II) atom (site symmetry ) is coordinated by two N,N'-bidentate 2,2'-biimidazole ligands and two weakly bonded 4-methyl-benzoate anions, resulting in a strongly elongated trans-CuO(2)N(4) octa-hedral geometry. In the crystal, adjacent mol-ecules are linked via pairs of N-H⋯O hydrogen bonds into chains propagating in [010].

The synthesis of the title salt, [Ag(C(6)H(7)N(4))(2)](NO(3))(3), was carried out employing a 1:2 molar ratio of 2,2'-biimidazole and silver nitrate respectively. The cation has crystallographically-imposed C2 symmetry with the metal atom in an almost linear coordination environment [N-Ag-N = 177.01 (17)°]. The crystal structure displays N-H⋯O and C-H⋯O hydrogen-bonding inter-actions.